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The authors thank COST Action 873 Bacterial diseases of stone fruits and nuts for support, Spanish project RTA2011-00140-C03 and FEDER for funds, and M. Scortichini for supplying strains and advice. They also thank the Spanish Diagnostic Laboratories of several provinces, for sending samples or information, and the Spanish Ministerio de Medio Ambiente y Medio Rural y Marino for granting the IVIA Laboratory, and finally L. Rius, R. Lahoz, J. Penalver, C. Morente, I.M. Berruete, R. Collados and M.L. Palazon, for their valuable technical assistance.

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CURRENT STATUS OF BACTERIAL SPOT OF STONE FRUITS AND ALMOND CAUSED BY XANTHOMONAS ARBORICOLA pv. PRUNI IN SPAIN

Publicado en:Journal Of Plant Pathology. 94 (57): 15-22 - 2012-01-01 94(57), DOI: 10.4454/jpp.v94i1sup.004

Autores: Rosello, M.; Santiago, R.; Palacio-Bielsa, A.; Garcia-Figueres, F.; Monton, C.; Cambra, M. A.; Lopez, M. M.;

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Resumen

In 2002, typical symptoms of bacterial spot disease of stone fruits caused by Xanthomomas arboricola pv. pruni (Xap) were observed for the first time on Japanese plum in Badajoz (south-western Spain). During the following years, the pathogen was found in seven other eastern and northern Spanish provinces (Valencia, Alicante, Zaragoza, Huesca, Navarra, Lerida and Mallorca) affecting different cultivars of Japanese plum, nectarine, peach and almond. There are few previous reports of Xap on almond, the Spanish outbreaks constituting its first detection on this host in the European Union (EU). Identification of the pathogen was performed using biochemical tests, fatty acid methyl esters (FAME) profiles, conventional and real-time PCR, and hypersensitivity reaction on tobacco leaves. Pathogenicity was demonstrated by inoculation of young potted plants of peach, plum or almond and successful re-isolations from plants with symptoms. In areas where infected plants were found, eradication programs were set up since Xap has a quarantine status according to phytosanitary EU legislation.

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